Which level of measurement is only characterized by exhaustiveness and mutual exclusiveness of attributes?

Students in Matt's communication class are required to present an informative speech. Matt decides he wants to talk about the use of genetically engineered food. He gathers his material and develops an outline of what he wants to cover

After he delivers his speech, some of the questions his classmates ask him are about his main point, to which Matt was perfectly clear. How could Matt have avoided this? A. He should have used the manuscript mode of delivery. B. He should have composed a statement of the central idea. C. He should have used prior analysis more effectively. D. He should have chosen a different topic.

In the mid-1990s, which issue prompted 85-year-old Doris Haddock to walk across

the United States, addressing citizens along the way to rally their support? A) Campaign finance reform B) Prescription drug benefits for seniors C) Social Security reform D) Medicare and Medicaid reform